package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.netty.handler.codec.serialization.ObjectEncoder;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "菜品浏览接口")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    RedisTemplate<String, Object> redisTemplate;

    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {

        // 1.获取redis key
        String key = "dish_" + categoryId;

        // 2.检查缓存是否存在，存在则直接返回
        ValueOperations<String, Object> ops = redisTemplate.opsForValue();
        List<DishVO> list = (List<DishVO>) ops.get(key);
        if (list != null) {
            return Result.success(list);
        }

        // 3.不存在，访问数据库
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        list = dishService.listWithFlavor(dish);

        // 4.加入缓存
        ops.set(key, list);

        return Result.success(list);
    }

}
